Add libclang capabilities to retriete template arguments from specializations.

Includes Python bindings.

Reviewed in http://reviews.llvm.org/D5621
Patch by Rob Springer

llvm-svn: 219529
diff --git a/clang/test/Index/preamble_macro_template.cpp b/clang/test/Index/preamble_macro_template.cpp
index 20f16b5..0771cab 100644
--- a/clang/test/Index/preamble_macro_template.cpp
+++ b/clang/test/Index/preamble_macro_template.cpp
@@ -4,7 +4,7 @@
 
 // RUN: c-index-test -write-pch %t.pch -fno-delayed-template-parsing -x c++-header %S/Inputs/preamble_macro_template.h
 // RUN: env CINDEXTEST_EDITING=1 c-index-test -test-load-source-reparse 5 local -fno-delayed-template-parsing -I %S/Inputs -include %t %s 2>&1 | tee %t.check.txt | FileCheck %s
-// CHECK: preamble_macro_template.h:4:6: FunctionDecl=foo:4:6 (Definition) [Specialization of foo:4:6] Extent=[4:1 - 6:2]
+// CHECK: preamble_macro_template.h:4:6: FunctionDecl=foo:4:6 (Definition) [Specialization of foo:4:6] [Template arg 0: kind: 1, type: int] Extent=[4:1 - 6:2]
 // CHECK: preamble_macro_template.h:4:13: ParmDecl=p:4:13 (Definition) Extent=[4:10 - 4:14]
 // CHECK: preamble_macro_template.h:4:16: CompoundStmt= Extent=[4:16 - 6:2]
 // CHECK: preamble_macro_template.h:5:3: CStyleCastExpr= Extent=[5:3 - 5:27]