update deps

ci/msys-deps.txt

@@ -13,7 +13,6 @@
 /bin/libfontconfig-1.dll
 /bin/libfreetype-6.dll
 /bin/libfribidi-0.dll
-/bin/libgcc_s_seh-1.dll
 /bin/libgdk-3-0.dll
 /bin/libgdk_pixbuf-2.0-0.dll
 /bin/libgdkmm-3.0-1.dll
@@ -38,5 +37,6 @@
 /bin/libpixman-1-0.dll
 /bin/libpng16-16.dll
 /bin/libsigc-2.0-0.dll
+/bin/libstdc++-6.dll
 /bin/libthai-0.dll
 /bin/zlib1.dll