Search for other ABIFLAGS builds of Python

Starting with Python3, standard Python installs may have additional ABI
flags attached to include directories and library names. As of 3.2, the
following flags are in the configure file:

    d -> --with-debug
    m -> --with-pymalloc
    u -> --with-wide-unicode

Python 3.3 seems to no longer have --with-wide-unicode. Hopefully Python
will ensure that the possible flags always show up in a stable order.
The 'd' flag is ignored since the debug library is considered separate.

There is still the problem where ABI flags cannot be specified in
find_package since the letters confuse the version comparator.

Modules/FindPythonLibs.cmake

@@ -82,7 +82,12 @@ FOREACH(_CURRENT_VERSION ${_Python_VERSIONS})
   ENDIF(WIN32)
 
   FIND_LIBRARY(PYTHON_LIBRARY
-    NAMES python${_CURRENT_VERSION_NO_DOTS} python${_CURRENT_VERSION}
+    NAMES
+    python${_CURRENT_VERSION_NO_DOTS}
+    python${_CURRENT_VERSION}mu
+    python${_CURRENT_VERSION}m
+    python${_CURRENT_VERSION}u
+    python${_CURRENT_VERSION}
     PATHS
       [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]/libs
       [HKEY_CURRENT_USER\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]/libs
@@ -120,6 +125,9 @@ FOREACH(_CURRENT_VERSION ${_Python_VERSIONS})
       [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]/include
       [HKEY_CURRENT_USER\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]/include
     PATH_SUFFIXES
+      python${_CURRENT_VERSION}mu
+      python${_CURRENT_VERSION}m
+      python${_CURRENT_VERSION}u
       python${_CURRENT_VERSION}
   )