patch 7.4.1106

Problem:    The nsis script can't be used from the appveyor build.
Solution:   Add "ifndef" to allow for variables to be set from the command
            line. Remove duplicate SetCompressor command. Support using other
            gettext binaries. (Ken Takata)  Update build instructions to use
            libintl-8.dll.

nsis/gvim.nsi

@@ -6,13 +6,19 @@
 # because uninstall deletes most files in $0.
 
 # Location of gvim_ole.exe, vimw32.exe, GvimExt/*, etc.
-!define VIMSRC "..\src"
+!ifndef VIMSRC
+  !define VIMSRC "..\src"
+!endif
 
 # Location of runtime files
-!define VIMRT ".."
+!ifndef VIMRT
+  !define VIMRT ".."
+!endif
 
 # Location of extra tools: diff.exe
-!define VIMTOOLS ..\..
+!ifndef VIMTOOLS
+  !define VIMTOOLS ..\..
+!endif
 
 # Comment the next line if you don't have UPX.
 # Get it at http://upx.sourceforge.net
@@ -32,9 +38,10 @@
 Name "Vim ${VER_MAJOR}.${VER_MINOR}"
 OutFile gvim${VER_MAJOR}${VER_MINOR}.exe
 CRCCheck force
-SetCompressor lzma
+SetCompressor /SOLID lzma
 SetDatablockOptimize on
 RequestExecutionLevel highest
+XPStyle on
 
 ComponentText "This will install Vim ${VER_MAJOR}.${VER_MINOR} on your computer."
 DirText "Choose a directory to install Vim (should contain 'vim')"
@@ -55,9 +62,6 @@ LicenseData ${VIMRT}\doc\uganda.nsis.txt
   !packhdr temp.dat "upx --best --compress-icons=1 temp.dat"
 !endif
 
-SetCompressor /SOLID lzma
-XPStyle on
-
 # This adds '\vim' to the user choice automagically.  The actual value is
 # obtained below with ReadINIStr.
 InstallDir "$PROGRAMFILES\Vim"
@@ -355,7 +359,9 @@ SectionEnd
 		File ${VIMRT}\keymap\README.txt
 		File ${VIMRT}\keymap\*.vim
 		SetOutPath $0
-		File ${VIMRT}\libintl.dll
+		File ${VIMRT}\libintl-8.dll
+		File ${VIMRT}\libiconv-2.dll
+		File /nonfatal ${VIMRT}\libwinpthread-1.dll
 	SectionEnd
 !endif