Add clang musl triplets patch to LLVMBootstrap@9

Author: staticfloat

0_RootFS/LLVMBootstrap@9/bundled/patches/0010-add-musl-triples.patch

@@ -0,0 +1,26 @@
+--- a/clang/lib/Driver/ToolChains/Gnu.cpp
++++ b/clang/lib/Driver/ToolChains/Gnu.cpp
+@@ -1871,6 +1871,7 @@
+   static const char *const AArch64LibDirs[] = {"/lib64", "/lib"};
+   static const char *const AArch64Triples[] = {
+       "aarch64-none-linux-gnu", "aarch64-linux-gnu", "aarch64-redhat-linux",
++      "aarch64-linux-musl",
+       "aarch64-suse-linux", "aarch64-linux-android"};
+   static const char *const AArch64beLibDirs[] = {"/lib"};
+   static const char *const AArch64beTriples[] = {"aarch64_be-none-linux-gnu",
+@@ -1898,6 +1899,7 @@
+       "x86_64-redhat-linux",    "x86_64-suse-linux",
+       "x86_64-manbo-linux-gnu", "x86_64-linux-gnu",
+       "x86_64-slackware-linux", "x86_64-unknown-linux",
++      "x86_64-linux-musl",
+       "x86_64-amazon-linux",    "x86_64-linux-android"};
+   static const char *const X32LibDirs[] = {"/libx32"};
+   static const char *const X86LibDirs[] = {"/lib32", "/lib"};
+@@ -1907,6 +1909,7 @@
+       "i586-redhat-linux",    "i386-redhat-linux",     "i586-suse-linux",
+       "i486-slackware-linux", "i686-montavista-linux", "i586-linux-gnu",
+       "i686-linux-android",   "i386-gnu",              "i486-gnu",
++      "i686-linux-musl",
+       "i586-gnu",             "i686-gnu"};
+ 
+   static const char *const MIPSLibDirs[] = {"/lib"};