musl: Rename files/ directory to musl/

Since it holds musl specific patches, name it so

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

diff --git a/meta/recipes-core/musl/files/0001-Make-dynamic-linker-a-relative-symlink-to-libc.patch b/meta/recipes-core/musl/musl/0001-Make-dynamic-linker-a-relative-symlink-to-libc.patch
similarity index 100%
rename from meta/recipes-core/musl/files/0001-Make-dynamic-linker-a-relative-symlink-to-libc.patch
rename to meta/recipes-core/musl/musl/0001-Make-dynamic-linker-a-relative-symlink-to-libc.patch