ld: add -Ttext ld command option

--section-start sectionname =org
Locate a section in the output file at the absolute address given by org. You
may use this option as many times as necessary to locate multiple sections in the
command line. org must be a single hexadecimal integer; for compatibility with
other linkers, you may omit the leading `0x' usually associated with hexadecimal
values. Note: there should be no white space between sectionname, the equals
sign (“=”), and org.

-Tbss org
-Tdata org
-Ttext org
Same as --section-start, with .bss, .data or .text as the sectionname.

refer to ld.pdf for more.

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
lds: add a simple linker script

u-boot.lds comes from u-boot, credit goes to the u-boot project

Signed-off-by: Fudong Bai <fudongbai@gmail.com>