Tweak linux_glibc properties for musl builds in external/python/cpython3

For convenience, builds against musl libc currently use the
linux_glibc properties because they are almost always linux-specific
and not glibc-specific.  In preparation for removing this hack,
tweak the linux_glibc properties by either moving them to host_linux,
which will apply to linux_glibc, linux_musl and linux_bionic, or
by setting appropriate musl or linux_musl properties.  Properties
that must not be repeated while musl uses linux_musl and also still
uses the linux_glibc properties are moved to glibc properties, which
don't apply to musl.  Whether these stay as glibc properties or get
moved back to linux_glibc later once the musl hack is removed is TBD.

Bug: 223257095
Test: m checkbuild
Test: m USE_HOST_MUSL=true host-native
Change-Id: If44954d3b047be6784e4782457fd0ea695f79484
diff --git a/Lib/Android.bp b/Lib/Android.bp
index 8656f5c..3b9c289 100644
--- a/Lib/Android.bp
+++ b/Lib/Android.bp
@@ -76,7 +76,11 @@
     name: "py3-stdlib-force-build",
     defaults_visibility: ["//visibility:private"],
     target: {
-        linux_glibc: {
+        glibc: {
+            exclude_srcs: [":py3-stdlib-prebuilt-srcs"],
+            srcs: [":py3-stdlib-srcs"],
+        },
+        musl: {
             exclude_srcs: [":py3-stdlib-prebuilt-srcs"],
             srcs: [":py3-stdlib-srcs"],
         },
@@ -93,13 +97,13 @@
     pkg_path: "stdlib",
     host_supported: true,
     target: {
-        android: {
+        bionic: {
             srcs: [":py3-stdlib-srcs"],
         },
-        linux_bionic: {
-            srcs: [":py3-stdlib-srcs"],
+        glibc: {
+            srcs: [":py3-stdlib-prebuilt-srcs"],
         },
-        linux_glibc: {
+        musl: {
             srcs: [":py3-stdlib-prebuilt-srcs"],
         },
         darwin: {