Captialize meta.description of all packages

In line with the Nixpkgs manual.

A mechanical change, done with this command:

  find pkgs -name "*.nix" | \
      while read f; do \
          sed -e 's/description\s*=\s*"\([a-z]\)/description = "\u\1/' -i "$f"; \
      done

I manually skipped some:

* Descriptions starting with an abbreviation, a user name or package name
* Frequently generated expressions (haskell-packages.nix)

pkgs/tools/compression/bzip2/default.nix

@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     homepage = "http://www.bzip.org";
-    description = "high-quality data compression program";
+    description = "High-quality data compression program";
 
     platforms = stdenv.lib.platforms.all;
     maintainers = [];

pkgs/tools/compression/lbzip2/default.nix

@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     homepage = http://lbzip2.org/;
-    description = "parallel bzip2 compression utility";
+    description = "Parallel bzip2 compression utility";
     license = licenses.gpl3;
     maintainers = with maintainers; [ abbradar ];
     platforms = platforms.unix;

pkgs/tools/compression/lzip/default.nix

@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     homepage = "http://www.nongnu.org/lzip/lzip.html";
-    description = "a lossless data compressor based on the LZMA algorithm";
+    description = "A lossless data compressor based on the LZMA algorithm";
     license = stdenv.lib.licenses.gpl3Plus;
     platforms = stdenv.lib.platforms.unix;
   };