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/build_conversion_test.go b/bp2build/build_conversion_test.go
index c40c45a..8433f52 100644
--- a/bp2build/build_conversion_test.go
+++ b/bp2build/build_conversion_test.go
@@ -426,13 +426,6 @@
             "darwin.txt",
             "not_windows.txt",
         ],
-        "//build/bazel/platforms/os:linux": [
-            "host.txt",
-            "linux.txt",
-            "glibc.txt",
-            "linux_glibc.txt",
-            "not_windows.txt",
-        ],
         "//build/bazel/platforms/os:linux_bionic": [
             "host.txt",
             "linux.txt",
@@ -440,6 +433,13 @@
             "linux_bionic.txt",
             "not_windows.txt",
         ],
+        "//build/bazel/platforms/os:linux_glibc": [
+            "host.txt",
+            "linux.txt",
+            "glibc.txt",
+            "linux_glibc.txt",
+            "not_windows.txt",
+        ],
         "//build/bazel/platforms/os:linux_musl": [
             "host.txt",
             "linux.txt",