parse_cmake: Also match hypen in pkg_check_modules(X)

If a cmake file defines a pkgconfig dependency with a hypen in it, make
sure we can handle it:
pkg_check_modules(DBUS-1 REQUIRED dbus-1 IMPORTED_TARGET)

Previously we used \w to match the first term (DBUS-1), which does *not*
match hyphens.

autospec/buildreq.py

@@ -508,7 +508,7 @@ def parse_cmake(self, filename, cmake_modules, conf32):
         """Scan a .cmake or CMakeLists.txt file for what's it's actually looking for."""
         findpackage = re.compile(r"^[^#]*find_package\((\w+)\b.*\)", re.I)
         findpackage_multiline = re.compile(r"^[^#]*find_package\((\w+)\b.*", re.I)
-        pkgconfig = re.compile(r"^[^#]*pkg_check_modules\s*\(\w+ (.*)\)", re.I)
+        pkgconfig = re.compile(r"^[^#]*pkg_check_modules\s*\([\w\-]+ (.*)\)", re.I)
         pkg_search_modifiers = {'REQUIRED', 'QUIET', 'NO_CMAKE_PATH',
                                 'NO_CMAKE_ENVIRONMENT_PATH', 'IMPORTED_TARGET'}
         extractword = re.compile(r'(?:"([^"]+)"|(\S+))(.*)')