manual: remove references to host/usr paths

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

docs/manual/faq-troubleshooting.txt

@@ -127,7 +127,7 @@ installed what and remove it when the package is unselected. However, it
 is much more complicated than that:
 
  * It is not only about the +target/+ directory, but also the sysroot in
-   +host/usr/<tuple>/sysroot+ and the +host/+ directory itself. All files
+   +host/<tuple>/sysroot+ and the +host/+ directory itself. All files
    installed in those directories by various packages must be tracked.
 
  * When a package is unselected from the configuration, it is not

docs/manual/using-buildroot-debugger.txt

@@ -35,7 +35,7 @@ Then, on the host, you should start the cross gdb using the following
 command line:
 
 ----------------------------
-<buildroot>/output/host/usr/bin/<tuple>-gdb -x <buildroot>/output/staging/usr/share/buildroot/gdbinit foo
+<buildroot>/output/host/bin/<tuple>-gdb -x <buildroot>/output/staging/usr/share/buildroot/gdbinit foo
 ----------------------------
 
 Of course, +foo+ must be available in the current directory, built

docs/manual/using-buildroot-toolchain.txt

@@ -9,7 +9,7 @@ can use the toolchain that was generated by Buildroot.
 
 The toolchain generated by Buildroot is located by default in
 +output/host/+. The simplest way to use it is to add
-+output/host/usr/bin/+ to your PATH environment variable and then to
++output/host/bin/+ to your PATH environment variable and then to
 use +ARCH-linux-gcc+, +ARCH-linux-objdump+, +ARCH-linux-ld+, etc.
 
 It is possible to relocate the toolchain - but then +--sysroot+ must