Add git to PATH (while in Cmder)

Add bundled git to PATH if we can't find git on PATH.

vendor/profile.ps1

@@ -11,7 +11,13 @@ if( -not $env:PSModulePath.Contains($CmderModulePath) ){
 }
 
 try {
+    # Check if git is on PATH, i.e. Git already installed on system
     Get-command -Name "git" -ErrorAction Stop >$null
+} catch {
+    $env:Path += ";$env:CMDER_ROOT\vendor\msysgit\bin"
+}
+
+try {
     Import-Module -Name "posh-git" -ErrorAction Stop >$null
     $gitStatus = $true
 } catch {