Reimplemented BLIS initialization/finalization.

Details:
- Rewrote bli_init() and bli_finalize() with OpenMP critical sections
  for thread-safety. Also added lots of explanatory comments.
- Renamed bli_init_safe() and bli_finalize_safe() with the _auto()
  suffix, and reimplemented for simplicity. Updated all invocations
  in BLAS compatibility layer to use _auto() suffix.

frame/compat/bla_her2k.c

@@ -62,7 +62,7 @@ void PASTEF77(ch,blasname)( \
 	err_t   init_result; \
 \
 	/* Initialize BLIS (if it is not already initialized). */ \
-	bli_init_safe( &init_result ); \
+	bli_init_auto( &init_result ); \
 \
 	/* Perform BLAS parameter checking. */ \
 	PASTEBLACHK(blasname)( MKSTR(ch), \
@@ -104,7 +104,7 @@ void PASTEF77(ch,blasname)( \
 	                       c, rs_c, cs_c ); \
 \
 	/* Finalize BLIS (if it was initialized above). */ \
-	bli_finalize_safe( init_result ); \
+	bli_finalize_auto( init_result ); \
 }
 
 #ifdef BLIS_ENABLE_BLAS2BLIS