linux: Chrome-side gyp changes for cross-compile

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index da571a965ef882527029b9c91ddf3254189f369b..06ff528b8e77a47c100f2440c3ad80c0289aa10b 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -667,8 +667,8 @@
             ],
           }],
           ['target_arch=="arm"', {
-            'conditions': [
-              ['armv7==1', {
+            'target_conditions': [
+              ['armv7==1 and _toolset=="target"', {
                 'cflags': [
                   '-march=armv7-a',
                   '-mtune=cortex-a8',
@@ -679,12 +679,15 @@
             ],
           }],
           ['sysroot!=""', {
-            'cflags': [
-              '--sysroot=<(sysroot)',
-            ],
-            'ldflags': [
-              '--sysroot=<(sysroot)',
-            ],
+            'target_conditions': [
+              ['_toolset=="target"', {
+                'cflags': [
+                  '--sysroot=<(sysroot)',
+                ],
+                'ldflags': [
+                  '--sysroot=<(sysroot)',
+                ],
+              }]]
           }],
           ['no_strict_aliasing==1', {
             'cflags': [