JBMC: Moved format_classpath.sh to scripts/format_classpath.sh

'format_classpath.sh' is used in regression tests that make use of the
'classpath' option. This script is needed to deal with the fact that
classpath syntex is OS-dependent.

The java concurrency regression tests make heavy use of this option as
such this commit moves 'format_classpath.sh' to
'scripts/format_classpath.sh'.

Furthermore, this commit makes a very small change to 'appveyor.yml'
that enables existing java concurrency regression tests to run on
Windows.

appveyor.yml

@@ -91,7 +91,6 @@ test_script:
     rmdir /s /q jbmc\classpath1
     rmdir /s /q jbmc\jar-file3
     rmdir /s /q jbmc\tableswitch2
-    rmdir /s /q jbmc-concurrency\explicit_thread_blocks
     cd ../..
 
     make -C jbmc/regression test

jbmc/regression/jbmc/overlay-class/correct-test.desc

@@ -1,6 +1,6 @@
 CORE
 Test.class
---classpath `./format_classpath.sh . annotations correct-overlay` --verbosity 10
+--classpath `../../../../scripts/format_classpath.sh . annotations correct-overlay` --verbosity 10
 ^Getting class `Test' from file \.[\\/]Test\.class$
 ^Getting class `Test' from file correct-overlay[\\/]Test\.class$
 ^Adding symbol from overlay class:  field 'x'$

jbmc/regression/jbmc/overlay-class/duplicate-test.desc

@@ -1,6 +1,6 @@
 CORE
 Test.class
---classpath `./format_classpath.sh . annotations . correct-overlay` --verbosity 10
+--classpath `../../../../scripts/format_classpath.sh . annotations . correct-overlay` --verbosity 10
 ^Getting class `Test' from file \.[\\/]Test\.class$
 ^Getting class `Test' from file correct-overlay[\\/]Test\.class$
 ^Skipping duplicate definition of class Test not marked with OverlayClassImplementation$

jbmc/regression/jbmc/overlay-class/misordered-test.desc

@@ -1,6 +1,6 @@
 CORE
 Test.class
---classpath `./format_classpath.sh annotations correct-overlay .` --verbosity 10
+--classpath `../../../../scripts/format_classpath.sh annotations correct-overlay .` --verbosity 10
 ^Getting class `Test' from file correct-overlay[\\/]Test\.class$
 ^Getting class `Test' from file \.[\\/]Test\.class$
 ^Skipping class Test marked with OverlayClassImplementation but found before original definition$

jbmc/regression/jbmc/overlay-class/unmarked-test.desc

@@ -1,6 +1,6 @@
 CORE
 Test.class
---classpath `./format_classpath.sh . annotations unmarked-overlay` --verbosity 10
+--classpath `../../../../scripts/format_classpath.sh . annotations unmarked-overlay` --verbosity 10
 ^Getting class `Test' from file \.[\\/]Test\.class$
 ^Getting class `Test' from file unmarked-overlay[\\/]Test\.class$
 ^Skipping duplicate definition of class Test not marked with OverlayClassImplementation$