Use //build/bazel/platforms/os:linux_glibc for osLinux

osLinux is implicitly glibc, use //build/bazel/platforms/os:linux_glibc
for the configurability select key for it.

Bug: 259266326
Test: build/bazel/ci/mixed_libc.sh
Test: USE_HOST_MUSL=true build/bazel/ci/mixed_libc.sh
Change-Id: Ifbd121ab3d943f3fdfbd3f6c3e982d1eaaaa9ec1
diff --git a/bp2build/cc_library_headers_conversion_test.go b/bp2build/cc_library_headers_conversion_test.go
index 686c9d5..32500a0 100644
--- a/bp2build/cc_library_headers_conversion_test.go
+++ b/bp2build/cc_library_headers_conversion_test.go
@@ -250,8 +250,8 @@
 				"deps": `[":base-lib"] + select({
         "//build/bazel/platforms/os:android": [":android-lib"],
         "//build/bazel/platforms/os:darwin": [":darwin-lib"],
-        "//build/bazel/platforms/os:linux": [":linux-lib"],
         "//build/bazel/platforms/os:linux_bionic": [":linux_bionic-lib"],
+        "//build/bazel/platforms/os:linux_glibc": [":linux-lib"],
         "//build/bazel/platforms/os:windows": [":windows-lib"],
         "//conditions:default": [],
     })`,
@@ -343,7 +343,7 @@
 				"export_system_includes": `select({
         "//build/bazel/platforms/os:android": ["android_include_dir"],
         "//build/bazel/platforms/os:darwin": ["darwin_include_dir"],
-        "//build/bazel/platforms/os:linux": ["linux_include_dir"],
+        "//build/bazel/platforms/os:linux_glibc": ["linux_include_dir"],
         "//conditions:default": [],
     }) + select({
         "//build/bazel/platforms/arch:arm": ["arm_include_dir"],