Added explicit chmod for C libraries needed for cygwin support

src/C/compress/Makefile

@@ -4,6 +4,7 @@ all: clean $(LIBNAME)
 
 $(LIBNAME): compress42.o
 	$(CC) $(CFLAGS) -shared -Wl,$(SONAME),$(LIBNAME) compress42.o -o $(LIBNAME) $(LDFLAGS)
+	chmod +x $(LIBNAME)
 
 compress42.o:
 	$(CC) $(CFLAGS) compress42.c -c

src/C/miniz/Makefile

@@ -4,6 +4,7 @@ all: clean $(LIBNAME)
 
 $(LIBNAME): tinfl.o
 	$(CC) $(CFLAGS) -shared -Wl,$(SONAME),$(LIBNAME) tinfl.o -o $(LIBNAME) $(LDFLAGS)
+	chmod +x $(LIBNAME)
 
 tinfl.o:
 	$(CC) $(CFLAGS) -c tinfl.c

src/binwalk/core/C.py

@@ -121,6 +121,7 @@ class Library(object):
                         '/usr/local/lib/lib%s.dylib' % library,
                        ] + glob.glob('/usr/local/Cellar/lib%s/*/lib/lib%s.dylib' % (library, library)),
 
+            'cygwin'  : ['/usr/local/lib/lib%s.so' % library],
             'win32'   : ['%s.dll' % library]
         }