Upgrade glew 1.5.8 -> 2.2.0

extern/glew/config/Makefile.openbsd

@@ -0,0 +1,17 @@
+NAME = $(GLEW_NAME)
+CC = cc
+LD = ld
+LDFLAGS.EXTRA = -L/usr/X11R6/lib
+LDFLAGS.GL = -lGLU -lGL -lX11 -lm
+LDFLAGS.STATIC = -Wl,-Bstatic
+LDFLAGS.DYNAMIC = -Wl,-Bdynamic
+CFLAGS.EXTRA += -I/usr/X11R6/include
+NAME = GLEW
+WARN = -Wall -W
+POPT = -O2
+BIN.SUFFIX =
+LIB.SONAME    = lib$(NAME).so.$(SO_MAJOR)
+LIB.DEVLNK    = lib$(NAME).so
+LIB.SHARED    = lib$(NAME).so.$(SO_VERSION)
+LIB.STATIC    = lib$(NAME).a
+LDFLAGS.SO    = -shared -soname $(LIB.SONAME)