Update C runtime install instructions

src/runtime/c/INSTALL

@@ -14,6 +14,9 @@ For Linux users
 
 You will need the packages: autoconf, automake, libtool, make
 
+- On Ubuntu: $ apt-get install autotools-dev
+- On Fedora: $ dnf install autoconf automake libtool
+
 The compilation steps are:
 
 $ autoreconf -i
@@ -28,7 +31,7 @@ For Mac OSX users
 The following is what I did to make it work on MacOSX 10.8:
 
 - Install XCode and XCode command line tools
-- Install Homebrew: http://mxcl.github.com/homebrew/
+- Install Homebrew: https://brew.sh
 
 $ brew install automake autoconf libtool
 $ glibtoolize