fix: correctly link against libraries with no lib prefix

Change-Id: I00896ab98c8e47f35ecd1ee411c281e7c3d2de6c

Author: BrandonThomasJonesARM

core/androidninja_backend.go

@@ -25,13 +25,17 @@ func pathToLibFlagAndroid(path string) string {
 	// "lib". This is required for build 'system' Android libraries like AIDLs
 	// ourselves.
 	_, base := filepath.Split(path)
-	ext := filepath.Ext(base)
-	base = strings.TrimSuffix(base, ext)
 	if base == "" {
 		utils.Die("Shared library name is empty")
 	}
-	base = strings.TrimPrefix(base, "lib")
-	return "-l" + base
+	if strings.HasPrefix(base, "lib") {
+		base = strings.TrimPrefix(base, "lib")
+		ext := filepath.Ext(base)
+		base = strings.TrimSuffix(base, ext)
+		return "-l" + base
+	} else {
+		return "-l:" + base + ".so"
+	}
 }
 
 // aliasActions implements generatorBackend.

gendiffer/tests/shared_library/no_prefix/out/android_oot/build.ninja.out

@@ -103,7 +103,7 @@ build ${g.bob.BuildDir}/target/shared/sharedtest_depends.so: $
     ldlibs = 
     linker = prebuilts/clang/host/linux-x86/clang-r522817/bin/clang++
     shared_libs_dir = ${g.bob.BuildDir}/target/shared
-    shared_libs_flags = -lsharedtest -Wl,-soname,sharedtest_depends.so -Wl,-rpath-link,${g.bob.BuildDir}/target/shared
+    shared_libs_flags = -l:sharedtest.so -Wl,-soname,sharedtest_depends.so -Wl,-rpath-link,${g.bob.BuildDir}/target/shared
     static_libs = 
 
 build ${g.bob.BuildDir}/target/shared/sharedtest_depends.so.toc: $