Consolidate ldflags that are used on all devices

Move ldflags that are specified for all devices into
deviceGlobalLdflags, and add them to linker.go:
-Wl,-z,noexecstack
-Wl,-z,relro
-Wl,-z,now
-Wl,--build-id=md5
-Wl,--warn-shared-textrel
-Wl,--fatal-warnings
-Wl,--no-undefined-version

Bug: 68855788
Test: m checkbuild
Change-Id: I82561b4189287d7638006f9e298c5151f9930c5e

cc/config/arm_device.go

@@ -45,15 +45,8 @@ var (
 	}
 
 	armLdflags = []string{
-		"-Wl,-z,noexecstack",
-		"-Wl,-z,relro",
-		"-Wl,-z,now",
-		"-Wl,--build-id=md5",
-		"-Wl,--warn-shared-textrel",
-		"-Wl,--fatal-warnings",
 		"-Wl,--icf=safe",
 		"-Wl,--hash-style=gnu",
-		"-Wl,--no-undefined-version",
 		"-Wl,-m,armelf",
 	}