[Android] Temporarily disable --warn-shared-textrel for mips

Mips builds hit this warning when linking the mesa library with libc++.
Temporarily disable the warning until a permanent solution can be found.

BUG=456380

Review URL: https://codereview.chromium.org/898403003

Cr-Commit-Position: refs/heads/master@{#317709}

build/common.gypi

@@ -3593,7 +3593,9 @@
               '-gdwarf-4',
             ],
             'conditions' : [
-              ['OS=="android"', {
+              ['OS=="android" and target_arch!="mipsel" and target_arch!="mips64el"', {
+                # TODO(jdduke) Re-enable on mips after resolving linking
+                # issues with libc++ (crbug.com/456380).
                 'ldflags': [
                   # Warn in case of text relocations.
                   '-Wl,--warn-shared-textrel',
@@ -3686,15 +3688,19 @@
                   '-fomit-frame-pointer',
                 ]
               }],
-              ['OS=="android"', {
-                'variables': {
-                  'release_optimize%': 's',
-                },
+              ['OS=="android" and target_arch!="mipsel" and target_arch!="mips64el"', {
+                # TODO(jdduke) Re-enable on mips after resolving linking
+                # issues with libc++ (crbug.com/456380).
                 'ldflags': [
                   # Warn in case of text relocations.
                   '-Wl,--warn-shared-textrel',
                 ],
               }],
+              ['OS=="android"', {
+                'variables': {
+                  'release_optimize%': 's',
+                },
+              }],
               ['profiling==1', {
                 'cflags': [
                   '-fno-omit-frame-pointer',

build/config/compiler/BUILD.gn

@@ -554,10 +554,12 @@ config("runtime_library") {
       "__GNU_SOURCE=1",  # Necessary for clone().
     ]
 
-    ldflags += [
-      "-Wl,--warn-shared-textrel",
-      "-nostdlib",
-    ]
+    # TODO(jdduke) Re-enable on mips after resolving linking
+    # issues with libc++ (crbug.com/456380).
+    if (cpu_arch != "mipsel" && cpu_arch != "mips64el") {
+      ldflags += [ "-Wl,--warn-shared-textrel" ]
+    }
+    ldflags += [ "-nostdlib" ]
 
     # NOTE: The stlport header include paths below are specified in cflags
     # rather than include_dirs because they need to come after include_dirs.
@@ -949,10 +951,15 @@ if (is_win) {
     if (!using_sanitizer) {
       common_optimize_on_cflags += [ "-fomit-frame-pointer" ]
     }
-    common_optimize_on_ldflags += [
-      # Warn in case of text relocations.
-      "-Wl,--warn-shared-textrel",
-    ]
+
+    # TODO(jdduke) Re-enable on mips after resolving linking
+    # issues with libc++ (crbug.com/456380).
+    if (cpu_arch != "mipsel" && cpu_arch != "mips64el") {
+      common_optimize_on_ldflags += [
+        # Warn in case of text relocations.
+        "-Wl,--warn-shared-textrel",
+      ]
+    }
   }
 
   if (is_mac) {