INSTALLING.md: apt-get install libssl-dev

docs/INSTALLING.md

@@ -122,6 +122,11 @@ make -j4
 make install
 ```
 
+### libssl, libcrypto
+```
+apt-get install libssl-dev
+```
+
 ### gtest
 
 For running the unittests:
@@ -299,7 +304,7 @@ sudo add-apt-repository --yes ppa:ubuntu-toolchain-r/test
 sudo add-apt-repository --yes ppa:kubuntu-ppa/backports
 sudo apt-get -qq update
 
-sudo apt-get install -yq git cmake ninja-build ccache libncurses5-dev liblzma-dev libreadline-dev libgmp3-dev autoconf libtool python-dev texlive-extra-utils clang-3.4 libstdc++-4.8-dev
+sudo apt-get install -yq git cmake ninja-build ccache libncurses5-dev liblzma-dev libreadline-dev libgmp3-dev autoconf libtool python-dev texlive-extra-utils clang-3.4 libstdc++-4.8-dev libssl-dev
 
 git clone --recursive https://github.com/dropbox/pyston.git ~/pyston
 
@@ -318,7 +323,7 @@ ninja check-pyston # run the test suite
 
 **Ubuntu 14.04**
 ```
-sudo apt-get install -yq git cmake ninja-build ccache libncurses5-dev liblzma-dev libreadline-dev libgmp3-dev autoconf libtool python-dev texlive-extra-utils clang-3.5
+sudo apt-get install -yq git cmake ninja-build ccache libncurses5-dev liblzma-dev libreadline-dev libgmp3-dev autoconf libtool python-dev texlive-extra-utils clang-3.5 libssl-dev
 
 git clone --recursive https://github.com/dropbox/pyston.git ~/pyston