Remove potentially unstable filenames from comments in generated files.

libavcodec/costablegen.c

@@ -54,7 +54,7 @@ int main(int argc, char *argv[])
     int fixed  = argc > 2 && !strcmp(argv[2], "fixed");
     double (*func)(double) = do_sin ? sin : cos;
 
-    printf("/* This file was generated by libavcodec/costablegen */\n");
+    printf("/* This file was automatically generated. */\n");
     printf("#define CONFIG_FFT_FLOAT %d\n", !fixed);
     printf("#include \"libavcodec/%s\"\n", do_sin ? "rdft.h" : "fft.h");
     for (i = 4; i <= BITS; i++) {

libavcodec/tableprint.c

@@ -36,6 +36,6 @@ WRITE_2D_FUNC(uint32_t)
 WRITE_2D_FUNC(float)
 
 void write_fileheader(void) {
-    printf("/* This file was generated by libavcodec/tableprint */\n");
+    printf("/* This file was automatically generated. */\n");
     printf("#include <stdint.h>\n");
 }