cmake: replace BUILD_... prefix of cmake options with ZXING_...
#128
| Job | Run time |
|---|---|
| 3m 13s | |
| 2m 15s | |
| 45s | |
| 3m 31s | |
| 8m 29s | |
| 1m 4s | |
| 52s | |
| 1m 32s | |
| 2m 50s | |
| 1m 38s | |
| 1m 17s | |
| 50s | |
| 3m 5s | |
| 4m 23s | |
| 1m 57s | |
| 37m 41s |