Rename jerry-libm to jerry-math (#4410)

That "libm" in the name of the library resulted in awkward naming
on *nix systems (`libjerry-libm.*`, "lib" occurring twice). And the
name of the corresponding header is `math.h` anyway.

Note that this is a breaking change in some sense. The commit
contains no API change, but the build system does change for users
of the math library.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

targets/curie_bsp/setup.py

@@ -76,7 +76,7 @@ def build_jerry_data(jerry_path):
     """
     jerry_sources = []
     jerry_dirs = set()
-    for sub_dir in ['jerry-core', 'jerry-libm', os.path.join('targets', 'curie_bsp', 'source')]:
+    for sub_dir in ['jerry-core', 'jerry-math', os.path.join('targets', 'curie_bsp', 'source')]:
         for file in find_sources(os.path.normpath(jerry_path), sub_dir):
             path = os.path.join('jerryscript', file)
             jerry_sources.append(path)
@@ -198,7 +198,7 @@ def create_quark_kbuild(project_path, jerry_path):
     quark_include_paths = [
         'include',
         'jerryscript',
-        os.path.join('jerryscript', 'jerry-libm', 'include'),
+        os.path.join('jerryscript', 'jerry-math', 'include'),
         os.path.join('jerryscript', 'targets' ,'curie_bsp', 'include')
     ] + list(jerry_data['dirs'])