phpmyadmin: add bash to RDEPENDS_phpmyadmin

Bashism:
possible bashism in plugins/transformations/generator_plugin.sh line 16 (echo -e):
  echo -e "Usage: ./generator_plugin.sh MIMEType MIMESubtype TransformationName [Description]\n"
possible bashism in plugins/transformations/generator_plugin.sh line 28 (${parm,[,][pat]} or ${parm^[^][pat]}):
MT="${MT^}"
possible bashism in plugins/transformations/generator_plugin.sh line 29 (${parm,[,][pat]} or ${parm^[^][pat]}):
MS="${MS^}"
possible bashism in plugins/transformations/generator_plugin.sh line 30 (${parm,[,][pat]} or ${parm^[^][pat]}):
TN="${TN^}"
possible bashism in plugins/transformations/generator_plugin.sh line 51 (should be 'b = a'):
    if [ "$4" == "--generate_only_main_class" ]; then

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>