Config changes to support target_os="fuchsia"

build/config/compiler/BUILD.gn

Index: build/config/compiler/BUILD.gn
diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index b05a8d746d8c5f0e2b9c84c2b3a16754672e65ef..ddf4044a55e6b6b3ba2b35f2256b083024bd789c 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -169,6 +169,8 @@ config("compiler") {
     configs += [ "//build/config/mac:compiler" ]
   } else if (is_ios) {
     configs += [ "//build/config/ios:compiler" ]
+  } else if (is_fuchsia) {
+    configs += [ "//build/config/fuchsia:compiler" ]
   } else if (current_os == "aix") {
     configs += [ "//build/config/aix:compiler" ]
   }
@@ -309,7 +311,7 @@ config("compiler") {
 
   # Linux/Android common flags setup.
   # ---------------------------------
-  if (is_linux || is_android) {
+  if (is_linux || is_android || is_fuchsia) {
     if (use_pic) {
       cflags += [ "-fPIC" ]
       ldflags += [ "-fPIC" ]
@@ -339,7 +341,6 @@ config("compiler") {
           "-lpthread",
         ]
       }
-      ldflags += [ "-Wl,--as-needed" ]
     }
   }