More General Cleanup (#1638)

* LINKER_FILES in makefile

* COLPOLY_GET_NORMAL

* math header

* libc

* M_PI for cosf and sinf files

* MAXFLOAT

* Revert "MAXFLOAT"

This reverts commit 96b75ffaa8.

* Remove SHT_MINV

* SHRT_MAX

* Add M_PI

* Angle macros

* f suffix

* Format

include/libc/string.h

@@ -1,7 +1,7 @@
 #ifndef LIBC_STRING_H
 #define LIBC_STRING_H
 
-#include "libc/stddef.h"
+#include "stddef.h"
 
 const char* strchr(const char* s, int c);
 size_t strlen(const char* s);