Make Linux hammerdb executable work with spaces in PATH

If the $PATH variable contained spaces then it would result in an error
like this:

```
./hammerdb: 6: export: (x86)/Microsoft: bad variable name
```

By double quoting the usage of the existing $PATH variable bash handles
this correctly.

hammerdb

@@ -1,9 +1,9 @@
 #!/bin/sh
 ########################################################################
 # \
-export LD_LIBRARY_PATH=./lib:$LD_LIBRARY_PATH
+export LD_LIBRARY_PATH="./lib:$LD_LIBRARY_PATH"
 # \
-export PATH=./bin:$PATH
+export PATH="./bin:$PATH"
 # \
 exec wish8.6 -file $0 ${1+"$@"}
 # \