Better THGeneric.h generation rules in bazel (pytorch#41285)

Summary:
It  doesn't do a good job of checking BLAS library capabilities, so hardcode the undef of BLAS_F2C

Pull Request resolved: pytorch#41285

Differential Revision: D22489781

Pulled By: malfet

fbshipit-source-id: 13a14f31e08d7f9ded49731e4fd23663bac75cd2

Author: malfet

BUILD.bazel

@@ -566,7 +566,10 @@ template_rule(
     src = "aten/src/TH/THGeneral.h.in",
     out = "aten/src/TH/THGeneral.h",
     substitutions = {
-        "cmakedefine": "define",
+        "#cmakedefine USE_BLAS": "#define USE_BLAS",
+        "#cmakedefine USE_LAPACK": "#define USE_LAPACK",
+        "#cmakedefine BLAS_F2C": "/* #undef BLAS_F2C */",
+        "#cmakedefine BLAS_USE_CBLAS_DOT": "#define BLAS_USE_CBLAS_DOT",
     },
 )