Disable bn_shift benchmarks on Windows

Windows doesn't know about SIGALRM

patches/bn_shift.patch

@@ -0,0 +1,45 @@
+--- tests/bn_shift.c.orig	Sun Dec 18 01:05:29 2022
++++ tests/bn_shift.c	Sun Dec 18 01:15:00 2022
+@@ -26,6 +26,10 @@
+ 
+ #include <openssl/bn.h>
+ 
++#ifndef _MSC_VER
++#define INCLUDE_BENCHMARKS
++#endif
++
+ static const char *bn_shift_want_hex = \
+     "02AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" \
+     "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA8";
+@@ -314,6 +318,8 @@ test_bn_rshift_to_zero(void)
+ 	return failed;
+ }
+ 
++#ifdef INCLUDE_BENCHMARKS
++
+ static void
+ benchmark_bn_lshift1(BIGNUM *bn)
+ {
+@@ -507,9 +513,12 @@ benchmark_run(const struct benchmark *bm, int seconds)
+ 	BN_free(bn);
+ }
+ 
++#endif
++
+ static void
+ benchmark_bn_shift(void)
+ {
++#ifdef INCLUDE_BENCHMARKS
+ 	const struct benchmark *bm;
+ 	size_t i;
+ 
+@@ -517,6 +526,9 @@ benchmark_bn_shift(void)
+ 		bm = &benchmarks[i];
+ 		benchmark_run(bm, 5);
+ 	}
++#else
++	return;
++#endif
+ }
+ 
+ int