tools/fiptool: Add Makefile.msvc to build on Windows.

This change adds nmake compatible Makefile.msvc file for
building (nmake /FMakefile.msvc) fiptool on the Windows.

Change-Id: Iccd1fe8da072edd09eb04b8622f27b3c4693b281
Signed-off-by: Girish Pathak <girish.pathak@arm.com>

tools/fiptool/Makefile.msvc

+#
+# Copyright (c) 2019, Arm Limited. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+CC = cl.exe
+LD = link.exe
+
+FIPTOOL = fiptool.exe
+OBJECTS = fiptool.obj tbbr_config.obj win_posix.obj
+
+INC = -I. -I..\..\include\tools_share
+CFLAGS = $(CFLAGS) /nologo /Za /Zi /c /O2 /MT
+
+all: $(FIPTOOL)
+
+$(FIPTOOL): $(OBJECTS)
+	$(LD) /INCREMENTAL:NO /debug /nodefaultlib:libc.lib /out:$@ $(LIBS) $**
+
+.PHONY: clean realclean
+
+clean:
+	del /f /q $(OBJECTS) > nul
+
+realclean:
+	del /f /q $(OBJECTS) $(FIPTOOL) > nul
+
+.c.obj:
+	$(CC) -c $(CFLAGS) $(INC) $< -Fo$@