openmp: add 5.1/5.2, fixes openmp with llvm v17

llvm v17 defaults to 5.1 and without this meson fails to find
openmp: 'ERROR: Dependency "openmp" not found, tried system'

Add 5.2 as well while at it.

mesonbuild/dependencies/misc.py

@@ -85,6 +85,8 @@ class DlSystemDependency(SystemDependency):
 class OpenMPDependency(SystemDependency):
     # Map date of specification release (which is the macro value) to a version.
     VERSIONS = {
+        '202111': '5.2',
+        '202011': '5.1',
         '201811': '5.0',
         '201611': '5.0-revision1',  # This is supported by ICC 19.x
         '201511': '4.5',