Use __cpuid_count for gnu C to avoid gitian build fail.

(cherry picked from commit bitcoin/bitcoin@63c16ed507)

src/crypto/sha256.cpp

@@ -11,7 +11,7 @@
 #include <stdexcept>
 #include <atomic>
 
-#if defined(__x86_64__) || defined(__amd64__)
+#if defined(__x86_64__) || defined(__amd64__) || defined(__i386__)
 #if defined(USE_ASM)
 #include <cpuid.h>
 namespace sha256_sse4
@@ -554,7 +554,11 @@ bool SelfTest() {
 // We can't use cpuid.h's __get_cpuid as it does not support subleafs.
 void inline cpuid(uint32_t leaf, uint32_t subleaf, uint32_t& a, uint32_t& b, uint32_t& c, uint32_t& d)
 {
+#ifdef __GNUC__
+    __cpuid_count(leaf, subleaf, a, b, c, d);
+#else
   __asm__ ("cpuid" : "=a"(a), "=b"(b), "=c"(c), "=d"(d) : "0"(leaf), "2"(subleaf));
+#endif
 }
 
 /** Check whether the OS has enabled AVX registers. */