feat(gx): add incomplete 'CGxDeviceGLSDL' (#2)

* chore(build): add vendored SDL 3.0.0 library

* chore(build): add vendored glew-cmake-2.2.0 library

* feat(console): in the presence of -opengl launch flag, change GxApi to OpenGl

* feat(gx): add uncompleted CGxDeviceGLSDL targeting Windows and Linux

* chore(build): change SDL3 linkage from shared (bad) to to static (good)

vendor/glew-cmake-2.2.0/config/Makefile.nacl-64

@@ -0,0 +1,31 @@
+NAME = $(REGAL_NAME)
+
+M_PREFIX = i686
+M_NAME ?= $(shell uname -s)
+ifeq (Linux,${M_NAME})
+M_PREFIX = i686
+endif
+
+CC  = $(M_PREFIX)-nacl-gcc
+CXX = $(M_PREFIX)-nacl-g++
+LD  = $(M_PREFIX)-nacl-ld
+STRIP ?=
+EXT.DYNAMIC = so
+LDFLAGS.EXTRA =
+LIBDIR =
+CFLAGS.EXTRA  += -fPIC
+CFLAGS.EXTRA  += -m64
+LDFLAGS.EXTRA += -melf64_nacl
+LDFLAGS.GL =
+LDFLAGS.GLU = -lRegalGLU
+LDFLAGS.GLUT = -lRegalGLUT
+LDFLAGS.STATIC =
+LDFLAGS.DYNAMIC = -shared
+WARN = -Wall -W -Wno-unused-parameter
+POPT = -O2
+BIN.SUFFIX =
+LIB.SONAME = lib$(NAME).so.$(SO_MAJOR)
+LIB.DEVLNK = lib$(NAME).so
+LIB.SHARED = lib$(NAME).so.$(SO_VERSION)
+LIB.STATIC = lib$(NAME).a
+LDFLAGS.SO = $(LDFLAGS.DYNAMIC) -soname=$(LIB.SONAME)