Update dr_flac.

extras/dr_flac.h

 // FLAC audio decoder. Public domain. See "unlicense" statement at the end of this file.
-// dr_flac - v0.9 - 2018-04-24
+// dr_flac - v0.9.1 - 2018-04-29
 //
 // David Reid - mackron@gmail.com
 
@@ -766,7 +766,7 @@ const char* drflac_next_vorbis_comment(drflac_vorbis_comment_iterator* pIter, dr
 
 // Compile-time CPU feature support.
 #if !defined(DR_FLAC_NO_SIMD) && (defined(DRFLAC_X86) || defined(DRFLAC_X64))
-    #ifdef _MSC_VER
+    #if defined(_MSC_VER) && !defined(__clang__)
         #if _MSC_VER >= 1400
             #include <intrin.h>
             static void drflac__cpuid(int info[4], int fid)
@@ -780,19 +780,8 @@ const char* drflac_next_vorbis_comment(drflac_vorbis_comment_iterator* pIter, dr
         #if defined(__GNUC__) || defined(__clang__)
             static void drflac__cpuid(int info[4], int fid)
             {
-                asm (
-                    "movl %[fid], %%eax\n\t"
-                    "cpuid\n\t"
-                    "movl %%eax, %[info0]\n\t"
-                    "movl %%ebx, %[info1]\n\t"
-                    "movl %%ecx, %[info2]\n\t"
-                    "movl %%edx, %[info3]\n\t"
-                    : [info0] "=rm"(info[0]),
-                      [info1] "=rm"(info[1]),
-                      [info2] "=rm"(info[2]),
-                      [info3] "=rm"(info[3])
-                    : [fid] "rm"(fid)
-                    : "eax", "ebx", "ecx", "edx"
+                __asm__ __volatile__ (
+                    "cpuid" : "=a"(info[0]), "=b"(info[1]), "=c"(info[2]), "=d"(info[3]) : "a"(fid), "c"(0)
                 );
             }
         #else
@@ -5524,6 +5513,9 @@ const char* drflac_next_vorbis_comment(drflac_vorbis_comment_iterator* pIter, dr
 
 // REVISION HISTORY
 //
+// v0.9.1 - 2018-04-29
+//   - Fix compilation error with Clang.
+//
 // v0.9 - 2018-04-24
 //   - Fix Clang build.
 //   - Start using major.minor.revision versioning.