Adding libcrypt-devel and libcrypt0 as requirements for ruby on Windows with Cygwin (Fixes rvm#3706)

Author: Piotr Kuczynski

scripts/functions/requirements/cygwin

@@ -54,9 +54,13 @@ requirements_cygwin_define()
       requirements_cygwin_define "${1%-head}"
       ;;
     (*)
-      requirements_check libiconv zlib zlib-devel openssl openssl-devel \
-        libyaml-devel libyaml0_2 sqlite3 make libtool gcc gcc-core \
-        autoconf automake bison m4 mingw64-i686-gcc-core mingw64-x86_64-gcc-core \
+      requirements_check make autoconf automake bison m4 libtool \
+        gcc gcc-core mingw64-i686-gcc-core mingw64-x86_64-gcc-core \
+        libiconv zlib zlib-devel \
+        openssl openssl-devel \
+        libcrypt-devel libcrypt0 \
+        libyaml-devel libyaml0_2 \
+        sqlite3 \
         patch
       if [[ "${_system_arch}" == "x86_64" ]]
       then requirements_check cygwin32-readline