[Driver][Android] Removed obsoleted --warn-shared-textrel

--warn-shared-textrel is ignored in ld.lld and obsoleted in GNU ld
(https://sourceware.org/bugzilla/show_bug.cgi?id=22909).

Note: binutils can be configured with --enable-textrel-check=[yes|error]
to make GNU ld error for text relocations by default, like ld.lld.

Reviewed By: srhines

Differential Revision: https://reviews.llvm.org/D118942

Author: MaskRay

clang/lib/Driver/ToolChains/Gnu.cpp

@@ -451,11 +451,6 @@ void tools::gnutools::Linker::ConstructJob(Compilation &C, const JobAction &JA,
       CmdArgs.push_back("--fix-cortex-a53-843419");
   }
 
-  // Android does not allow shared text relocations. Emit a warning if the
-  // user's code contains any.
-  if (isAndroid)
-      CmdArgs.push_back("--warn-shared-textrel");
-
   ToolChain.addExtraOpts(CmdArgs);
 
   CmdArgs.push_back("--eh-frame-hdr");

clang/test/Driver/linux-ld.c

@@ -989,12 +989,6 @@
 // CHECK-ANDROID-HASH-STYLE-M: "{{.*}}ld{{(.exe)?}}"
 // CHECK-ANDROID-HASH-STYLE-M: "--hash-style=gnu"
 
-// RUN: %clang %s -### -o %t.o 2>&1 \
-// RUN:     --target=armv7-linux-android21 \
-// RUN:   | FileCheck --check-prefix=CHECK-ANDROID-WARN-SHARED-TEXTREL %s
-// CHECK-ANDROID-WARN-SHARED-TEXTREL: "{{.*}}ld{{(.exe)?}}"
-// CHECK-ANDROID-WARN-SHARED-TEXTREL: "--warn-shared-textrel"
-
 // RUN: %clang %s -### -o %t.o 2>&1 --target=mips64-linux-gnuabin32 \
 // RUN:   | FileCheck --check-prefix=CHECK-MIPS64EL-GNUABIN32 %s
 // CHECK-MIPS64EL-GNUABIN32: "{{.*}}ld{{(.exe)?}}"