Exporting MakeBazelTarget() in testing.go

Since we are putting conversion tests in the same
package as the module being converted from now on

Test: m bp2build
Change-Id: Ied53589d497fef70bfa11d8f6067459c9a50cd72
diff --git a/bp2build/cc_prebuilt_library_static_test.go b/bp2build/cc_prebuilt_library_static_test.go
index 489a53d..7c224f1 100644
--- a/bp2build/cc_prebuilt_library_static_test.go
+++ b/bp2build/cc_prebuilt_library_static_test.go
@@ -36,7 +36,7 @@
 	bazel_module: { bp2build_available: true },
 }`,
 			ExpectedBazelTargets: []string{
-				makeBazelTarget("prebuilt_library_static", "libtest", AttrNameToString{
+				MakeBazelTarget("prebuilt_library_static", "libtest", AttrNameToString{
 					"static_library": `"libf.so"`,
 				}),
 			},
@@ -63,7 +63,7 @@
 	bazel_module: { bp2build_available: true },
 }`,
 			ExpectedBazelTargets: []string{
-				makeBazelTarget("prebuilt_library_static", "libtest", AttrNameToString{
+				MakeBazelTarget("prebuilt_library_static", "libtest", AttrNameToString{
 					"static_library": `select({
         "//build/bazel/platforms/arch:arm": "libg.so",
         "//build/bazel/platforms/arch:arm64": "libf.so",
@@ -118,21 +118,21 @@
 	bazel_module: { bp2build_available: true },
 }`,
 		ExpectedBazelTargets: []string{
-			makeBazelTarget("genlex", "foo_lib_genlex_l", AttrNameToString{
+			MakeBazelTarget("genlex", "foo_lib_genlex_l", AttrNameToString{
 				"srcs": `[
         "foo1.l",
         "foo2.l",
     ]`,
 				"lexopts": `["--foo_flags"]`,
 			}),
-			makeBazelTarget("genlex", "foo_lib_genlex_ll", AttrNameToString{
+			MakeBazelTarget("genlex", "foo_lib_genlex_ll", AttrNameToString{
 				"srcs": `[
         "bar1.ll",
         "bar2.ll",
     ]`,
 				"lexopts": `["--foo_flags"]`,
 			}),
-			makeBazelTarget("cc_library_static", "foo_lib", AttrNameToString{
+			MakeBazelTarget("cc_library_static", "foo_lib", AttrNameToString{
 				"srcs": `[
         "bar.cc",
         ":foo_lib_genlex_ll",