Make GN pass -target flags only on Android Clang

build/config/compiler/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/config.gni")
 import("//build/config/sysroot.gni")
 
 # compiler ---------------------------------------------------------------------
 #
 # Base compiler configuration.
@@ skipping 193 matching lines @@
       # Don't export symbols from statically linked libraries.
       "-Wl,--exclude-libs=ALL",
     ]
     if (cpu_arch == "arm") {
       ldflags += [
         # Enable identical code folding to reduce size.
         "-Wl,--icf=safe",
       ]
     }
 
-    if (cpu_arch == "arm") {
-      cflags += [
-        "-target arm-linux-androideabi",
-        "-mllvm -arm-enable-ehabi",
-      ]
-      ldflags += [ "-target arm-linux-androideabi" ]
-    } else if (cpu_arch == "x86") {
-      cflags += [ "-target x86-linux-androideabi" ]
-      ldflags += [ "-target x86-linux-androideabi" ]
+    if (is_clang) {
+      if (cpu_arch == "arm") {
+        cflags += [
+          "-target arm-linux-androideabi",
+          "-mllvm -arm-enable-ehabi",
+        ]
+        ldflags += [ "-target arm-linux-androideabi" ]
+      } else if (cpu_arch == "x86") {
+        cflags += [ "-target x86-linux-androideabi" ]
+        ldflags += [ "-target x86-linux-androideabi" ]
+      }
     }
   }
 }
 
 # runtime_library -------------------------------------------------------------
 #
 # Sets the runtime library and associated options.
 #
 # How do you determine what should go in here vs. "compiler" above? Consider if
 # a target might choose to use a different runtime library (ignore for a moment
@@ skipping 358 matching lines @@
   } else {
     cflags = [ "-g1" ]
   }
 }
 
 config("no_symbols") {
   if (!is_win) {
     cflags = [ "-g0" ]
   }
 }