Move the D compilers around and add 5.2.0

etc/config/d.amazon.properties

@@ -1,14 +1,12 @@
-compilers=gdc44:gdc46:gdc49u:gdc49
-defaultCompiler=gdc49
-compiler.gdc44.exe=/usr/bin/gdc-4.4
-compiler.gdc44.alias=/usr/bin/gdc-4.4
-compiler.gdc44.name=gdc 4.4 (Ubuntu)
-compiler.gdc46.exe=/usr/bin/gdc-4.6
-compiler.gdc46.alias=/usr/bin/gdc-4.6
-compiler.gdc46.name=gdc 4.6 (Ubuntu)
-compiler.gdc49u.exe=/usr/bin/gdc-4.9
-compiler.gdc49u.alias=/usr/bin/gdc-4.9
-compiler.gdc49u.name=gdc 4.9 (Ubuntu)
-compiler.gdc49.exe=/opt/x86_64-gdcproject-linux-gnu/bin/gdc
+compilers=gdc48:gdc49:gdc52
+defaultCompiler=gdc52
+# URL compatibility...
+compiler.gdc49.exe=/opt/gdc4.9.3/x86_64-pc-linux-gnu/bin/gdc
 compiler.gdc49.alias=/opt/x86_64-gdcproject-linux-gnu/bin/gdc
-compiler.gdc49.name=gdc 2.066.1 (4.9)
+compiler.gdc49.name=gdc 4.9.3
+
+compiler.gdc48.exe=/opt/gdc4.8.2/x86_64-gdcproject-linux-gnu/bin/gdc
+compiler.gdc48.name=gdc 4.8.2
+
+compiler.gdc52.exe=/opt/gdc5.2.0/x86_64-pc-linux-gnu/bin/gdc
+compiler.gdc52.name=gdc 5.2.0