bump jruby 1.7.21

Signed-off-by: Brian Goff <cpuguy83@gmail.com>

Author: cpuguy83

1.7/jdk/Dockerfile

@@ -2,8 +2,8 @@ FROM java:8-jdk
 
 RUN apt-get update && apt-get install -y libc6-dev --no-install-recommends && rm -rf /var/lib/apt/lists/*
 
-ENV JRUBY_VERSION 1.7.20.1
-ENV JRUBY_SHA1 6a6e701a3a5769ec5d53a78660521c37da36e41f
+ENV JRUBY_VERSION 1.7.21
+ENV JRUBY_SHA1 4955b69a913b22f96bd599eff2a133d8d1ed42c6
 RUN mkdir /opt/jruby \
   && curl -fSL https://s3.amazonaws.com/jruby.org/downloads/${JRUBY_VERSION}/jruby-bin-${JRUBY_VERSION}.tar.gz -o /tmp/jruby.tar.gz \
   && echo "$JRUBY_SHA1 /tmp/jruby.tar.gz" | sha1sum -c - \

1.7/jre/Dockerfile

@@ -2,8 +2,8 @@ FROM java:8-jre
 
 RUN apt-get update && apt-get install -y libc6-dev --no-install-recommends && rm -rf /var/lib/apt/lists/*
 
-ENV JRUBY_VERSION 1.7.20.1
-ENV JRUBY_SHA1 6a6e701a3a5769ec5d53a78660521c37da36e41f
+ENV JRUBY_VERSION 1.7.21
+ENV JRUBY_SHA1 4955b69a913b22f96bd599eff2a133d8d1ed42c6
 RUN mkdir /opt/jruby \
   && curl -fSL https://s3.amazonaws.com/jruby.org/downloads/${JRUBY_VERSION}/jruby-bin-${JRUBY_VERSION}.tar.gz -o /tmp/jruby.tar.gz \
   && echo "$JRUBY_SHA1 /tmp/jruby.tar.gz" | sha1sum -c - \