Change integer type in CBLAS function signatures to f77_int, and add proper const-correctness to BLAS layer.

frame/compat/check/bla_herk_check.h

@@ -36,14 +36,14 @@
 
 void bla_herk_check
      (
-       char*     dt_str,
-       char*     op_str,
-       f77_char* uploc,
-       f77_char* transa,
-       f77_int*  m,
-       f77_int*  k,
-       f77_int*  lda,
-       f77_int*  ldc
+       const char*     dt_str,
+       const char*     op_str,
+       const f77_char* uploc,
+       const f77_char* transa,
+       const f77_int*  m,
+       const f77_int*  k,
+       const f77_int*  lda,
+       const f77_int*  ldc
      );
 
 #endif