Revert of Android: Avoid linking with --gc-sections.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index b916700326cb4681eca8b2a38073477002cb5d28..db2739cbd36cab64fcf150744b71392dad12f93d 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -4934,6 +4934,15 @@
                   }],
                 ],
               }],
+              ['asan==1', {
+                'cflags': [
+                  # Android build relies on -Wl,--gc-sections removing
+                  # unreachable code. ASan instrumentation for globals inhibits
+                  # this and results in a library with unresolvable relocations.
+                  # TODO(eugenis): find a way to reenable this.
+                  '-mllvm -asan-globals=0',
+                ],
+              }],
               ['target_arch == "arm" and order_profiling==0', {
                 'ldflags': [
                   # Enable identical code folding to reduce size.