lib/Makefile: use CC, add bcheck to libtcc1.a

Also:
- fix "make tcc_p" (profiling version)
- remove old gcc flags:
  -mpreferred-stack-boundary=2 -march=i386 -falign-functions=0
- remove test "hello" for Darwin (cannot compile to file)

tcc.h

@@ -47,7 +47,9 @@
 # include <sys/time.h>
 # include <sys/ucontext.h>
 # include <sys/mman.h>
-# include <dlfcn.h>
+# ifndef CONFIG_TCC_STATIC
+#  include <dlfcn.h>
+# endif
 #else
 # include <windows.h>
 # include <sys/timeb.h>
@@ -134,10 +136,6 @@
 #define CONFIG_TCC_BCHECK /* enable bound checking code */
 #endif
 
-#if defined(_WIN32) && !defined(TCC_TARGET_PE)
-#define CONFIG_TCC_STATIC
-#endif
-
 /* define it to include assembler support */
 #if !defined(TCC_TARGET_ARM) && !defined(TCC_TARGET_C67)
 #define CONFIG_TCC_ASM