Use a linker script for host bionic embedded linker sections

Use an implicit linker script instead of flags in a file to specify
the locations of the host bionic embedded linker and to prevent it
from being stripped.

Test: build and run host bionic binary
Change-Id: I64e12118d33c67bab5e657cbc3ea8cde8f0fd7e6
diff --git a/cc/testing.go b/cc/testing.go
index f5c5ec5..bee170f 100644
--- a/cc/testing.go
+++ b/cc/testing.go
@@ -490,7 +490,7 @@
 				}
 
 				cc_genrule {
-					name: "host_bionic_linker_flags",
+					name: "host_bionic_linker_script",
 					host_supported: true,
 					device_supported: false,
 					target: {
@@ -501,7 +501,7 @@
 							enabled: true,
 						},
 					},
-					out: ["linker.flags"],
+					out: ["linker.script"],
 				}
 
 				cc_defaults {