Adds tls_edit utility which patches irt_core.nexe's TLS usage.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index d53c6e6bffb182696eda85c1361b84edcf55359d..01ca89abeba40983458b057d3db09dea71d816b7 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -302,48 +302,56 @@
             ],
           }],
           [ 'target_arch=="arm"', {
-              'cflags': [
-                  '-Wno-abi',
-                  '-fno-exceptions',
-                  '-Wall',
-                  '-fPIC',
-                  '--sysroot=<(sysroot)',
-              ],
-              'ldflags': [
-                  '--sysroot=<(sysroot)',
-              ],
-              # TODO(mcgrathr): This is copied from the arm section of
-              # chromium/src/build/common.gypi, but these details really
-              # should be more fully harmonized and shared.
-              'conditions': [
-                  ['arm_thumb==1', {
-                      'cflags': [
-                          '-mthumb',
-                      ]
-                  }],
-                  ['arm_version==7', {
-                      'cflags': [
-                          '-march=armv7-a',
-                          '-mtune=cortex-a9',
-                          '-mfloat-abi=<(arm_float_abi)',
-                      ],
-                      'conditions': [
-                          ['arm_neon==1', {
-                              'cflags': [ '-mfpu=neon', ],
-                          }, {
-                              'cflags': [ '-mfpu=<(arm_fpu)', ],
-                          }]
-                      ],
-                  }],
+              'target_conditions': [
+                ['_toolset=="target"', {
+                  'cflags': [
+                      '-Wno-abi',
+                      '-fno-exceptions',
+                      '-Wall',
+                      '-fPIC',
+                      '--sysroot=<(sysroot)',
+                  ],
+                  'ldflags': [
+                      '--sysroot=<(sysroot)',
+                  ],
+                  # TODO(mcgrathr): This is copied from the arm section of
+                  # chromium/src/build/common.gypi, but these details really
+                  # should be more fully harmonized and shared.
+                  'conditions': [
+                      ['arm_thumb==1', {
+                          'cflags': [
+                              '-mthumb',
+                          ]
+                      }],
+                      ['arm_version==7', {
+                          'cflags': [
+                              '-march=armv7-a',
+                              '-mtune=cortex-a9',
+                              '-mfloat-abi=<(arm_float_abi)',
+                          ],
+                          'conditions': [
+                              ['arm_neon==1', {
+                                  'cflags': [ '-mfpu=neon', ],
+                              }, {
+                                  'cflags': [ '-mfpu=<(arm_fpu)', ],
+                              }]
+                          ],
+                      }],
+                  ],
+                }],
               ],
             }],
             ['target_arch=="mipsel"', {
-              # Copied from chromium build/common.gypi
-              'conditions': [
-                ['mips_arch_variant=="mips32r2"', {
-                  'cflags': ['-mips32r2'],
-                }, {
-                  'cflags': ['-mips32'],
+              'target_conditions': [
+                ['_toolset=="target"', {
+                  # Copied from chromium build/common.gypi
+                  'conditions': [
+                    ['mips_arch_variant=="mips32r2"', {
+                      'cflags': ['-mips32r2'],
+                    }, {
+                      'cflags': ['-mips32'],
+                    }],
+                  ],
                 }],
               ],
             }],