qsort could be renamed to not collide with libc one

[Yoshqu]

In my particular scenario I have created amalgamated code:

cat *.c platform/win32/*.c > ../agla.c

This works if qsort is named differently (because all includes are in one file).

$ gcc  -I. -O3 -fomit-frame-pointer *.c platform/win32/*.c -o bench-mingw.exe
$ ./bench-mingw.exe
Incredibly Simple Benchmark! 1.0.0 (5 seconds per test)

Random numbers (10447.64):              807.1M / s
Word Count (15):                        1.7M / s
CRC32 (0x9F83FE8C):                     2.8M / s
RLE (12.19%):                           996.1k / s
Sort (202572):                          3.2M / s

$ gcc  -I. -O3 -fomit-frame-pointer ../agla.c -o bench-mingw-agla.exe
$ ./bench-mingw-agla.exe
Incredibly Simple Benchmark! 1.0.0 (5 seconds per test)

Random numbers (10447.64):              809.6M / s
Word Count (15):                        2.5M / s
CRC32 (0x9F83FE8C):                     2.8M / s
RLE (12.19%):                           841.1k / s
Sort (202572):                          3.3M / s

Quite funny to see that whole program compiling make such difference on Word Count, while being worse on RLE.