Android: Disable 'sincos' optimization to avoid 'icu' link errors.

icu.gyp

Index: icu.gyp
diff --git a/icu.gyp b/icu.gyp
index 3236307b88b252e47722cfeaab3482833b09e1ea..d86003c5350a7295973f9f18aaa139595fd12f53 100644
--- a/icu.gyp
+++ b/icu.gyp
@@ -319,6 +319,14 @@
                 '-Wno-return-type-c-linkage',
               ],
             }],
+            ['OS == "android" and clang==0', {
+                # Disable sincos() optimization to avoid a linker error since
+                # Android's math library doesn't have sincos().  Either
+                # -fno-builtin-sin or -fno-builtin-cos works.
+                'cflags': [
+                    '-fno-builtin-sin',
+                ],
+            }],
             ['OS == "android" and use_system_stlport == 1', {
               # ICU requires RTTI, which is not present in the system's stlport,
               # so we have to include gabi++.