class/kernel: Also check for _text as entrypoint symbol
class/kernel: Also check for _text as entrypoint symbol

Add support for kernels where entrypoint symbol is _text instead of _start.

Signed-off-by: Esben Haabendal <da90c138e4a9573086862393cde34fa33d74f6e5@haabendal.dk>

sknsean/core,sknsean/core,hundeboll/core,sknsean/core,hundeboll/core,sknsean/core,sknsean/core,hundeboll/core,diorcety/oe-lite-core,diorcety/oe-lite-core,hundeboll/core